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US4413843A Microcapsules, method for their production and pressure sensitive copying sheet 失效
微胶囊,其生产方法和压敏复印纸

Microcapsules, method for their production and pressure sensitive
copying sheet
摘要:
The method of making microcapsules comprises performing polycondensation of an aminoaldehyde resin prepolymer in an aqueous dispersion including particles of hydrophobic core material in the presence of anion-modified polyvinyl alcohol to form aminoaldehyde resin microcapsules walls around said particles of hydrophobic core material.
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